What is element compound and molecule?
For example, the element sodium is made up of only sodium atoms. A molecule is a substance that contains two or more atoms chemically joined, such as H2,O2. A compound is a substance that is made up of two or more different elements that are chemically joined, such as H2O,CO,NaCl.
What is element or molecule definition?
Element: An element is a substance that is made entirely of one type of atom. For example : the element zinc is made up of only zinc atoms. Molecules : Molecules are a group of atoms covalently bonded to each other. The molecule can consist of atoms of the same element, or atoms of different elements.
What is a molecule class 9?
A group of two or more than two atoms of the same or different elements that are chemically bonded together is called a molecule. For example: Two atoms of hydrogen (H2) and one atom of oxygen (O2) react with each other and form one molecule of water.
What are atoms and molecule?
A tiny particle of a chemical element is called an atom, which may or may not exist independently. Molecules refer to the group of atoms that the bond binds together, representing the smallest unit in a compound. Two or more identical or distinct atoms are chemically bonded.
What is called molecule?
Molecules are made up of one or more atoms. If they contain more than one atom, the atoms can be the same (an oxygen molecule has two oxygen atoms) or different (a water molecule has two hydrogen atoms and one oxygen atom). Biological molecules, such as proteins and DNA, can be made up of many thousands of atoms.
What is molecule class 9th?
What is called atom?
An atom is the basic building block of chemistry. It is the smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chemical element.
What is atom Class 11?
Atom is the smallest particle of matter that can take part in a chemical reaction. Atom is made of electron, proton and neutrons. Atom is not capable of independent existence.
What is the difference between element and compound?
Elements are substances that are pure in their nature and are composed of a single atom. Compounds are also pure substances that are composed of elements in definite proportions.
What are elements Class 9?
An element is a substance which cannot be spilt up into two or simpler substances by the means of chemical methods of applying heat, light or electric energy. For Example: – Hydrogen is an element which cannot be split into two or more simpler substances.
What is the molecule of compound?
Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom.
What is a compound easy definition?
1) In chemistry, a compound is a substance that results from a combination of two or more different chemical element s, in such a way that the atom s of the different elements are held together by chemical bonds that are difficult to break.
What is the difference element and a compound?
The difference between an element and a compound is that an element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions. Examples of elements include iron, copper, hydrogen and oxygen.
Is an element the same as a compound?
The difference between element and compound is that element is a specific species of an atom that has a similar number of protons in the atomic nuclei. A chemical compound is a substance that is composed of several molecules that are identical, along with atoms of multiple elements that are held together with the help of chemical bonds.
How do you identify elements and compounds?
Elements are defined by the number of protons in a given atom, and the atom is the smallest unit of an element. In contrast, a compound is defined by the identity and organization of multiple atoms, with the smallest unit of a compound being a molecule. Some compounds do contain only one element, such as diatomic gases or graphite.
What is an element and a compound?
Elements are pure substances which are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions. There are nearly 118 elements (at present) of which nearly 94 occur naturally on Earth. Compounds are almost endless.